Potty Training....on hold....

My son seems to have put potty training on hold. He figured out what the main use for the diaper is, and has put it to good use. Even down to telling me to change his wet one, so that he can poop in a dry one. When he tells me he's pooping, or I see signs, I strip him down and place him on the toilet. But for some odd reason since we moved here, he WILL NOT sit on the toilet. It's like something's clicked in his mind and the toilet is not fun anymore, he tells me he can't, and acts scared. But if by some chance poop does go into the toilet, he's excited to flush it, and I reward him with a treat.
How do I make potty time for a 28mo old more enjoyable. We did start kinda early last summer just because he seemed interested. If some of you remember my Facebook status from way back then, I got really good advice from friends, and potty time was going pretty smoothly. (For a 20mo old) I was impressed with the interest he had in the potty business. Even when I was babysitting and he had an older (slightly) friend to look up too, things were coming along.
But ever since we moved into our new home. Everything's stopped. I know there were a couple weeks in there with Christmas, New Years, packing and moving, where I slowed things down. So I know that's a factor.
Plus moving to new surroundings might play into the mess. But is it still too early? Is he a little young to start potty training? Should I go back to full force potty training, or wait till he's more comfortable?
I've heard and read some good techniques, and have implemented some. But what do you, or did you do to make the potty training more enjoyable for you and your child?